{"id":"CVE-2024-42136","summary":"cdrom: rearrange last_media_change check to avoid unintentional overflow","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncdrom: rearrange last_media_change check to avoid unintentional overflow\n\nWhen running syzkaller with the newly reintroduced signed integer wrap\nsanitizer we encounter this splat:\n\n[  366.015950] UBSAN: signed-integer-overflow in ../drivers/cdrom/cdrom.c:2361:33\n[  366.021089] -9223372036854775808 - 346321 cannot be represented in type '__s64' (aka 'long long')\n[  366.025894] program syz-executor.4 is using a deprecated SCSI ioctl, please convert it to SG_IO\n[  366.027502] CPU: 5 PID: 28472 Comm: syz-executor.7 Not tainted 6.8.0-rc2-00035-gb3ef86b5a957 #1\n[  366.027512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[  366.027518] Call Trace:\n[  366.027523]  \u003cTASK\u003e\n[  366.027533]  dump_stack_lvl+0x93/0xd0\n[  366.027899]  handle_overflow+0x171/0x1b0\n[  366.038787] ata1.00: invalid multi_count 32 ignored\n[  366.043924]  cdrom_ioctl+0x2c3f/0x2d10\n[  366.063932]  ? __pm_runtime_resume+0xe6/0x130\n[  366.071923]  sr_block_ioctl+0x15d/0x1d0\n[  366.074624]  ? __pfx_sr_block_ioctl+0x10/0x10\n[  366.077642]  blkdev_ioctl+0x419/0x500\n[  366.080231]  ? __pfx_blkdev_ioctl+0x10/0x10\n...\n\nHistorically, the signed integer overflow sanitizer did not work in the\nkernel due to its interaction with `-fwrapv` but this has since been\nchanged [1] in the newest version of Clang. It was re-enabled in the\nkernel with Commit 557f8c582a9ba8ab (\"ubsan: Reintroduce signed overflow\nsanitizer\").\n\nLet's rearrange the check to not perform any arithmetic, thus not\ntripping the sanitizer.","modified":"2026-04-02T12:17:50.425396Z","published":"2024-07-30T07:46:30.975Z","related":["MGASA-2024-0277","MGASA-2024-0278","SUSE-SU-2024:3194-1","SUSE-SU-2024:3195-1","SUSE-SU-2024:3383-1","SUSE-SU-2025:20044-1","SUSE-SU-2025:20047-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42136.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0c97527e916054acc4a46ffb02842988acb2e92b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3ee21e14c8c329168a0b66bab00ecd18f5d0dee3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e809bc112712da8f7e15822674c6562da6cdf24c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/efb905aeb44b0e99c0e6b07865b1885ae0471ebf"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42136.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-42136"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"67f1e027c27054e641584655020a417eaac9cb3a"},{"fixed":"0c97527e916054acc4a46ffb02842988acb2e92b"},{"fixed":"3ee21e14c8c329168a0b66bab00ecd18f5d0dee3"},{"fixed":"e809bc112712da8f7e15822674c6562da6cdf24c"},{"fixed":"efb905aeb44b0e99c0e6b07865b1885ae0471ebf"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42136.json"}}],"schema_version":"1.7.5"}